US4594149A - Apparatus and method employing magnetic fluids for separating particles - Google Patents

Apparatus and method employing magnetic fluids for separating particles Download PDF

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Publication number
US4594149A
US4594149A US06/380,753 US38075382A US4594149A US 4594149 A US4594149 A US 4594149A US 38075382 A US38075382 A US 38075382A US 4594149 A US4594149 A US 4594149A
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United States
Prior art keywords
particles
magnetic
stream
separation
density
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Expired - Lifetime
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US06/380,753
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English (en)
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Uri T. Andres
Alan L. Devernoe
Michael S. Walker
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MAG-SEP Corp A CORP OF NY
Mag Sep Corp
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Mag Sep Corp
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Priority to US06/380,753 priority Critical patent/US4594149A/en
Assigned to MAG-SEP CORPORATION, A CORP OF NY. reassignment MAG-SEP CORPORATION, A CORP OF NY. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ANDRES, URI T., DEVERNOE, ALAN L., WALKER, MICHAEL S.
Priority to CA000428330A priority patent/CA1229070A/en
Priority to ES522583A priority patent/ES8500573A1/es
Priority to MX197380A priority patent/MX159739A/es
Priority to ZA833668A priority patent/ZA833668B/xx
Priority to AU16064/83A priority patent/AU573527B2/en
Priority to PCT/US1983/000796 priority patent/WO1983004193A1/en
Priority to EP83902072A priority patent/EP0108808B1/en
Priority to DE8383902072T priority patent/DE3377049D1/de
Priority to BR8307370A priority patent/BR8307370A/pt
Priority to FI840239A priority patent/FI84320C/sv
Priority to ES533375A priority patent/ES533375A0/es
Priority to US06/869,397 priority patent/US4819808A/en
Publication of US4594149A publication Critical patent/US4594149A/en
Application granted granted Critical
Assigned to MERIDIAN BANK, HAMILTON MALL, SEVENTH STREET, ALLENTOWN, PENNSYLVANIA 18101 A PA BANKING ORGANIZATION reassignment MERIDIAN BANK, HAMILTON MALL, SEVENTH STREET, ALLENTOWN, PENNSYLVANIA 18101 A PA BANKING ORGANIZATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: INTERMAGNETICS GENERAL CORPORATION
Priority to US07/335,129 priority patent/US4961841A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
    • B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C1/00—Magnetic separation
    • B03C1/32—Magnetic separation acting on the medium containing the substance being separated, e.g. magneto-gravimetric-, magnetohydrostatic-, or magnetohydrodynamic separation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S505/00—Superconductor technology: apparatus, material, process
    • Y10S505/825—Apparatus per se, device per se, or process of making or operating same
    • Y10S505/931—Classifying, separating, and assorting solids using magnetism
    • Y10S505/932—Separating diverse particulates
    • Y10S505/933—Separating diverse particulates in liquid slurry

Definitions

  • This invention relates to the separation of particulate matter on the basis of differences in magnetic susceptibilities, densities or both.
  • Particle to be Separated--Particulate matter including solids and immiscible liquids.
  • Paramagnetic--Substances solid or liquid, exhibiting relatively weak positive magnetic properties and which experience forces in a magnetic field which vary in accordance with the product of field strength and field gradient.
  • Ferromagnetic--Substances both solid and liquid, exhibiting relatively strong positive magnetic properties and which experience forces in a magnetic field which vary only with the field gradient.
  • the term is intended to include ferrimagnetic materials for present purposes because the overall behavior of such materials in our invention is similar to ferromagnetic materials.
  • Diamagnetic--Substances both solid and liquid, exhibiting negative force proportional to the product of the field and field gradient.
  • Magnetic Fluid Medium Any fluid substance exhibiting magnetic properties whether ferromagnetic, paramagnetic or diamagnetic. This includes suspensions of magnetic particles in liquids or gases.
  • HGMS high gradient magnetic separation
  • MHS magnetohydrostatic separation
  • our system employs a specially designed separation duct surrounded by a multipolar magnet shaped so as to produce substantially only radially directed axisymmetric magnetic forces on materials within the duct.
  • Particles to be separated are passed through the duct in a magnetic fluid medium and undergo radial magnetic forces dependent upon the relative effective magnetic susceptibilities of the fluid medium and the particles themselves.
  • Means are provided for rotating the medium and the particles contained therein in order to create differential centrifugal forces based upon the density differences between the individual particles and between the particles and the medium.
  • the method of our invention is to establish an axially flowing column of a magnetic fluid medium within a magnetic field suitable for producing substantially only radially directed axisymmetric forces on magnetic materials contained within the column.
  • Centrifugal forces may be selectively used for separations where differences in density are present by rotating the column.
  • various separations can be made in accordance with pre-selected parameters. As noted above, certain separations are optimally made using quadrupolar magnets and a paramagnetic fluid, some being with rotation and others without. Another class of separation is best made with a quadrupolar magnet and a ferrofluid without rotation.
  • FIG. 1 is a schematic representation, partly in cross-section, showing an experimental system embodying the invention.
  • FIG. 2 is an enlarged view of a portion of the separator shown in FIG. 1.
  • FIG. 3 is a transverse cross-sectional view of the separator taken on line 3--3 of FIG. 2.
  • FIG. 4 shows an alternate embodiment of the separator duct employing multiple separation channels.
  • FIG. 5 is a schematic representation showing the manner in which a multipolar electromagnet could be wound for use in our separator.
  • FIG. 6 is a schematic representation of the magnetic forces experienced by materials within the magnetic fields created by the magnets used in our invention.
  • FIG. 1 shows an experimental embodiment of our invention in which a special separator duct 10 is centrally located within a cylindrically shaped multipolar magnet 12.
  • a reception funnel 22 is provided for the introduction of ore or other material containing particles 64 and 66 to be separated as well as a magnetic fluid medium 62.
  • Delivery tube 28 delivers the contents of funnel 22 to duct 10.
  • a feed hopper 24 is positioned so that materials to be separated can be fed into funnel 22 in dry or wet form.
  • Magnet 12 surrounds duct 10 and produces substantially only radially directed axisymmetric magnetic forces on materials contained within duct 10.
  • the "separation duct” is understood to mean the duct in which the magnetic field of that character is created and in which the separation of particles takes place.
  • Magnet 12 may be a permanent magnet or an electromagnet having either conventional or superconducting windings.
  • the windings may be arranged as illustrated in FIG. 5.
  • a quadrupolar magnet 12' is shown with windings 13 running in elongated longitudinal loops on a cylindrically shaped body 15 having an open central bore 25.
  • windings 13 running in elongated longitudinal loops on a cylindrically shaped body 15 having an open central bore 25.
  • N and S north and south poles
  • the direction of forces experienced upon particles having positive magnetic susceptibilities is indicated by the arrows.
  • these forces are substantially only radially directed throughout most of the magnet length, except for areas near the ends of the magnet.
  • septum 16 is provided near the lower end of duct 10, duct 10 being shown in a substantially vertical position.
  • the purpose of septum 16, as shown more clearly in FIG. 2, is to physically divide the useful cross-sectional area of duct 10 into inner and outer fraction conduits 13 and 11, respectively.
  • septum 16 is equipped with a knife-edge 17 or other dividing edge at its upper extremity where this physical separation begins.
  • FIG. 1 also shows a central longitudinal flow guide 14 which is held in place within duct 10 by three vanes 58, more clearly shown in FIG. 3.
  • the purpose of flow guide 14 is to direct the medium 62 and the particles 64 and 66 away from the central portion of duct 10 as those particles move downwardly through the separator. This is desirable because the magnetic and centrifugal forces developed on or about the central axis of duct 10 are either non-existent or so small that they tend to be of relatively little use.
  • outer fraction conduit 11 leads into outer fraction collection tube 18 while inner fraction conduit 13 leads to inner fraction collection tube 19.
  • These tubes are fed into separated product collection containers 38 and 40 illustrated schematically in FIG. 1. There, they are separated from the magnetic fluid medium 62 by any conventional means such as an appropriate filtering system.
  • the filtering system is desirably effective to sufficiently cleanse and recondition medium 62 so that it may be recycled through lines 54 and 56 as shown.
  • Peristaltic pumps 50 and 52 are provided in lines 54 and 56, respectively, so that the flows can be adjusted in outer fraction conduit 11 and inner fraction conduit 13 for optimum efficiency in accordance with a particular separation being made.
  • the system can, of course, be operated with open flow without recovery and recycling of magnetic fluid 62.
  • Rotation of the medium 62 and particles 64 and 66 is accomplished in our preferred embodiment by rotation of duct 10 and magnet 12. Vanes 58 are fitted tightly enough inside duct 10 so that flow guide 14 rotates therewith. Septum 16 is rigidly connected to guide 14 and is journaled at its connection with inner fraction collection tube 19. Likewise, duct 10 terminates in an enlarged portion 9 which is journaled at its connection with outer fraction collection tube 18. Rotation is imparted to the assembly by means of drive pully 32 at the bottom of magnet 12. Drive pulley 32 is connected to a suitable variable speed motor by means of a drive belt, these latter structures not being shown. Reception funnel 22 may be journaled in upper swivel 20 so that it may be restrained from rotating with magnet 12 and duct 10 when desired.
  • the central axis of the separation duct is vertically oriented. Also, the central axis of the cylindrically shaped multipolar magnet 12 is vertically oriented and coincident with the axis of separation duct 10. In this orientation, the particles can be allowed to fall by gravity through the separation duct.
  • the invention can be operated in two basic modes, one in which the medium and the particles contained therein are rotated and the other in which they are not.
  • a flowing or stagnant medium and particles can be utilized in either mode.
  • the susceptibility of the magnetic fluid medium 62 is chosen so that it exceeds that of at least some or all the particles to be separated. In this instance, if the susceptibilities of the particles to be separated are reasonably close to one another, separations can be performed on the basis of differences in density. Since some or all of the particles are buoyed inwardly, it is possible to adjust the angular velocity of the duct so that at least some of the heavier particles will be driven outwardly by centrifugal force. In other words, the centrifugal force on these particles will exceed the inwardly directed magnetic buoyancy force on them, if any.
  • a relatively weak magnetic field say about 5000 oersteds (a strong field being about 50,000 oersteds)
  • a strongly magnetic fluid the susceptibilities of weakly magnetic particles will have only a small influence on the separation, and separations based primarily on density differences can be achieved even for particles having significantly different magnetic susceptibilities.
  • the use of a sextupolar magnet, for example, in combination with a ferromagnetic fluid is especially useful in such cases, as will be seen more clearly from the examples given hereinafter.
  • the throughput of the system can be increased by causing the medium 62 and particles contained therein to pass downwardly through duct 10.
  • the only limitation on the linear velocity of the medium relates to dwell time.
  • the particles to be separated must have sufficient time in the magnetic field to permit them to be driven to their desired radial positions.
  • duct 10 is desirably an elongate duct so as to provide adequate dwell times at reasonably high throughput levels.
  • magnet configuration field strength, angular velocity, and duct design is based upon calculation of the forces to which the particles are to be subjected. These forces, of course, vary with the magnetic susceptibilities and densities of the particles themselves. They are also dependent upon the magnetic properties and the density of the fluid medium.
  • A is the flow cross-section of the duct.
  • the throughput can be calculated by substitution of (5) into (2), (2) into (1), (1) into (8), and (8) into (10). Analyses similar to the foregoing can be performed for a ferromagnetic fluid and sextupole magnet or other combinations of fluids and multipoles.
  • a further alternative would be to impart a non-circular shape to the magnetic forces by using ferromagnetic or other suitable materials to reshape the magnetic field somewhat. Or one could simply vibrate the contents of duct 10. By doing such things, particles undergoing separation in the rotational mode will experience jigging because of the superimposed cyclically varying forces. It is believed that this would be of advantage in driving the particles through slurries, particularly where the solid loading is high, because the particles would be jostled about, thus promoting the separation process.
  • FIG. 4 shows an alternate embodiment of our separation duct which is preferred.
  • the purpose of the illustrated structure is to subdivide the useful space within separation duct 10 into a plurality of separation channels 21' and 21". The reason for doing this is to shorten the radial distance particles must travel in the separation process.
  • the resulting separation channels 21' and 21" are quite elongate and thin. The relatively long dwell times thus provided, coupled with the short drift distances required for separation, make the separator more efficient, thus making better use of the available magnetic force provided by magnet 12.
  • outer fraction conduits 11' and 11" both feed into outer fraction collection tube 18.
  • inner fraction conduits 13' and 13" both feed into inner fraction collection tube 19.
  • FIG. 4 is intended to be illustrative only. It should be understood that the number of channels like 21' and 22' might be considerably more than two. Using mathematical analysis like that set forth above, one can compute the optimum number and size of separation channels, considering the loss of useful separation space resulting from the cumulative thickness of the duct walls. Also, we believe that there are alternative means for creating the condition of short particle radial travel under the radial forces by dividing up the space within the duct. For example, one can create a series of concentric annular ducts with small radial thickness. Alternatively, one could construct a single duct comprised of a tightly co-wrapped spiral of inner and outer duct walls and septum. To include this possibility and other divisions of the separation space that accomplish the same end, we refer to such a sub-division of the separator space as "substantially concentric and substantially annular" in the claims which follow.
  • the first laboratory separator was constructed using a cylindrical superconducting quadrupole magnet having a 2.75 inch diameter cold bore, an 8-inch useful length and an operating range up to 2.5 Tesla with a 13 kiloGauss per inch gradient.
  • the magnet was located within a 60-inch-long cryogenic containment dewar having an outside diameter of 12 inches and a warm bore of 17/16 inches.
  • Several separation ducts were constructed for operation in this device.
  • the first separation duct was fabricated with a closed bottom from clear polycarbonate. An internal septum was provided for fraction sample collection. In operation, the duct was installed in the warm bore of the dewar and rotated from the top by a variable speed drive motor. Experiments were performed using a static fluid column with hand-feeding of minerals into the top of the delivery tube. The minerals would fall through the fluid approximately 4 feet before they entered the 8-inch-long region of magnet influence of lateral magnetohydrostatic separation forces, reorient themselves radially, and fall into separate concentric collection zones created by the septum.
  • Example #1 and #2 The results of two of the separations performed with the above apparatus are shown as Examples #1 and #2 in Table 1.
  • the first example illustrates the capability for separation of fine particles by differences in density using our MHS centrifuge.
  • the second example illustrates use of the device in the alternate mode, where separation is achieved by differences in magnetic properties without fluid rotation.
  • the high quality example separation (of two weakly magnetic minerals having a clear difference in magnetic susceptibility that is small compared to the susceptibility of either constituent) cannot be achieved by any other magnetic separation method, conventional, high intensity or high gradient.
  • Another separation duct modified for different presentation of slurry feed into the separation zone, was used to successfully demonstrate separations with a flow of the slurry through the separator using an arrangement like that shown in FIG. 1.
  • This duct provided a thin (1/4-inch-wide) annular flow space for the fluid-particle slurry, demonstrating the separation in a thin elongated separation region.
  • This duct together with the quadrupolar field configuration and paramagnetic fluid, represents one of the preferred manifestations of the MHS centrifuge concept.
  • One separation in this duct, Example #3 illustrates the ability of our MHS centrifuge to operate with flow of the fluid-particle slurry and to separate materials on the basis of a small difference in particle densities, in this case only 0.5 g/cc.
  • Example #4 illustrates the ability of the device to achieve quality separations under conditions simulating practical levels of throughput: that is, for a high velocity of slurry flow (33 feet-per-minute) at practical levels of solids concentration (6% by volume).
  • the example here is for the alternate case of separation by differences in magnetic properties, but similar throughputs should result for separations by magnetic properties as well.
  • Example #5 illustrates that the difficult separation of Example #2 (by weak magnetic susceptibility differences) can also be achieved with a ferromagnetic fluid and under conditions of slurry flow.
  • an MHS centrifuge device using a low field is preferred because it is relatively insensitive to the magnetic characteristic of the particles.
  • the stronger, ferromagnetic fluid is also desirable to achieve the inward magnetic buoyancy force levels required. Consequently, a one-meter-long, 2-inch bore MHS centrifuge separator was designed and constructed using samarium cobalt permanent magnets in a sextupolar configuration. The magnets produced 0.398 Tesla at the 2-inch-diameter with a gradient of 7.36 kiloGauss per inch. To save space, the separator was designed so that the magnet assembly would rotate with the duct.
  • Example #6 provides an illustration of the capability of this device for the type of separation for which it was designed; i.e., density difference separations where variable magnetic characteristics in the concentrate and in the gangue would normally confuse the separation. It is also an example of the use of a sextupole magnet with the ferrofluid, one of the preferred manifestations of our MHS centrifuge concept.
  • a light magnetic mineral was cleanly separated, by density, from a non-magnetic, heavy mineral. Analysis of the separated products shows a 98.5% (Pyrite) grade concentrate and a 5.6% (Pyrite) grade tailing. Recovery of the Pyrite calculates to 98.5% for this separation.
  • a similar advantage results for separation by small magnetic differences in weakly magnetic materials.
  • high intensity magnetic separation can only be used to collect minerals having magnetic susceptibilities of about 200 ⁇ 10 -6 emu/cc or higher, such as wolframite, garnet or chromite.
  • our separator we can not only collect, but we can actually separate particles from one another on the basis of small differences in magnetic susceptibilities on the order of 10 ⁇ 10 -6 to 1 ⁇ 10 -6 cmu/cc.
  • Such separations so far as we know, have not previously been possible and have been regarded by most investigators as unlikely possibilities.
  • the vanes 58 on flow guide 14 can be designed in a spiral configuration so that fluid pumped therethrough will undergo a swirling action as it descends through the separator.
  • jigging might be accomplished by superimposing another magnetic field on the basic field provided by magnet 12.
  • an entirely different magnetic source field could be used in place of magnet 12, the basic requirements being the production of radially directed axisymmetric separation forces without substantial axial components.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Centrifugal Separators (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US06/380,753 1982-05-21 1982-05-21 Apparatus and method employing magnetic fluids for separating particles Expired - Lifetime US4594149A (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
US06/380,753 US4594149A (en) 1982-05-21 1982-05-21 Apparatus and method employing magnetic fluids for separating particles
CA000428330A CA1229070A (en) 1982-05-21 1983-05-17 Apparatus and method employing magnetic fluid for separating particles
ES522583A ES8500573A1 (es) 1982-05-21 1983-05-20 Metodo para separar particulas en un campo gravitarorio.
MX197380A MX159739A (es) 1982-05-21 1983-05-20 Metodo y aparato para separar particulas en base a diferencias en sus densidades o diferencias en sus propiedades magneticas y densidades
ZA833668A ZA833668B (en) 1982-05-21 1983-05-20 Long dwell,short drift,magnetohydrostatic centrifuge and method
DE8383902072T DE3377049D1 (en) 1982-05-21 1983-05-23 Apparatus and method employing magnetic fluid for separating particles
PCT/US1983/000796 WO1983004193A1 (en) 1982-05-21 1983-05-23 Long dwell, short drift, magnetohydrostatic centrifuge and method
EP83902072A EP0108808B1 (en) 1982-05-21 1983-05-23 Apparatus and method employing magnetic fluid for separating particles
AU16064/83A AU573527B2 (en) 1982-05-21 1983-05-23 Magnetohydrostatic centrifuge
BR8307370A BR8307370A (pt) 1982-05-21 1983-05-23 Processo para separar particulas; processo para separar particulas em um campo gravitacional; aparelho para separar particulas no interior de um meio de fluido magnetico; aparelho para separar particulas em um campo gravitacional
FI840239A FI84320C (sv) 1982-05-21 1984-01-20 Förfarande och anordning för separering av samling partiklar, som har en inom vissa gränser varierande täthet och vissa magnetiska egenskape r
ES533375A ES533375A0 (es) 1982-05-21 1984-06-13 Aparato par separar particulas en un campo gravitatorio.
US06/869,397 US4819808A (en) 1982-05-21 1986-06-02 Apparatus and method employing magnetic fluids for separating particles
US07/335,129 US4961841A (en) 1982-05-21 1989-04-07 Apparatus and method employing magnetic fluids for separating particles

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Application Number Priority Date Filing Date Title
US06/380,753 US4594149A (en) 1982-05-21 1982-05-21 Apparatus and method employing magnetic fluids for separating particles

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US06/869,397 Continuation US4819808A (en) 1982-05-21 1986-06-02 Apparatus and method employing magnetic fluids for separating particles

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US4594149A true US4594149A (en) 1986-06-10

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US06/380,753 Expired - Lifetime US4594149A (en) 1982-05-21 1982-05-21 Apparatus and method employing magnetic fluids for separating particles

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US (1) US4594149A (sv)
EP (1) EP0108808B1 (sv)
AU (1) AU573527B2 (sv)
CA (1) CA1229070A (sv)
DE (1) DE3377049D1 (sv)
ES (2) ES8500573A1 (sv)
FI (1) FI84320C (sv)
MX (1) MX159739A (sv)
WO (1) WO1983004193A1 (sv)
ZA (1) ZA833668B (sv)

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US5169517A (en) * 1989-08-02 1992-12-08 Institut Francais Du Petrole Process for the treatment of petroleum fractions containing metals, in the presence of solid particles, including a magnetohydrostatic separation stage for the said particles and the recycling of part of them
US5224604A (en) * 1990-04-11 1993-07-06 Hydro Processing & Mining Ltd. Apparatus and method for separation of wet and dry particles
AU645686B2 (en) * 1991-05-24 1994-01-20 Billiton Intellectual Property B.V. Magnetic separation process
US5968820A (en) * 1997-02-26 1999-10-19 The Cleveland Clinic Foundation Method for magnetically separating cells into fractionated flow streams
US6355178B1 (en) 1999-04-02 2002-03-12 Theodore Couture Cyclonic separator with electrical or magnetic separation enhancement
US6467630B1 (en) 1999-09-03 2002-10-22 The Cleveland Clinic Foundation Continuous particle and molecule separation with an annular flow channel
US20050178701A1 (en) * 2004-01-26 2005-08-18 General Electric Company Method for magnetic/ferrofluid separation of particle fractions
US20060108271A1 (en) * 2004-11-19 2006-05-25 Solvay Chemicals Magnetic separation process for trona
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WO2015128486A1 (en) * 2014-02-28 2015-09-03 Eco-Nomic Innovations Limited Dense media separation method
DE102008047841B4 (de) * 2008-09-18 2015-09-17 Siemens Aktiengesellschaft Vorrichtung zum Abschneiden ferromagnetischer Partikel aus einer Suspension
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US11185870B2 (en) * 2017-04-03 2021-11-30 Karlsruher Institut Fuer Technologie Device and method for the selective fractionation of ultrafine particles
RU2776946C1 (ru) * 2021-10-20 2022-07-29 федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный аграрный университет" (ФГБОУ ВО Волгоградский ГАУ) Устройство для комплексной оценки продовольственного зерна и семенного материала

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US6026966A (en) * 1996-11-05 2000-02-22 Svoboda; Jan Ferrohydrostatic separation method and apparatus
WO2012105819A1 (es) * 2011-02-02 2012-08-09 Cavazos Borobia Antonio De Jesus Dispositivo de tratamiento de fluidos por inducción magnética
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Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US653345A (en) * 1899-12-02 1900-07-10 Theodore J Mayer Diamagnetic separation.
AT78392B (de) * 1915-04-16 1919-09-25 Gustav W Meyer Vorrichtung zur magnetischen Ausscheidung von Metallen und metallhaltigen Stoffen aus Flüssigkeiten und Gemengen oder zur Trennung von Metallgemischen durch ein magnetisches Drehfeld.
US1527069A (en) * 1923-09-06 1925-02-17 Jr Orrin B Peck Process or method of and apparatus for magnetic centrifugal separation
US2875949A (en) * 1957-11-07 1959-03-03 Tarsoly Balazs Material separator and energy apparatus
US2967618A (en) * 1960-03-28 1961-01-10 Vane Zdenek Vortical separator
US3279602A (en) * 1963-02-18 1966-10-18 Al Inc Magnetic separation process and equipment therefor
US3294237A (en) * 1963-05-31 1966-12-27 Weston David Magnetic separator
US3483968A (en) * 1967-06-12 1969-12-16 Avco Corp Method of separating materials of different density
US3608718A (en) * 1968-12-20 1971-09-28 Bethlehem Steel Corp Magnetic separator method and apparatus
SU385623A1 (ru) * 1968-10-04 1973-06-14 Авторы изобретени витель Магнитогидростатический центробежный сепаратор
GB1322229A (en) * 1970-07-09 1973-07-04 Bethlehem Steel Corp Method and apparatus for separating magnetic material
US3788465A (en) * 1972-04-28 1974-01-29 Us Interior Device and process for magneto-gravimetric particle separation using non-vertical levitation forces
US3951789A (en) * 1973-10-11 1976-04-20 Allied Chemical Corporation Novel high diffusivity membranes
GB1497769A (en) * 1975-06-20 1978-01-12 Kloeckner Humboldt Deutz Ag Method and a device for preparation of material by means of magnetic separation
SU649465A1 (ru) * 1977-02-24 1979-02-28 Центральный Научно-Исследовательский Геолого-Разведочный Институт Цветных И Благородных Металлов(Цнигри) Способ мокрого магнитного разделени минералов
GB2014061A (en) * 1978-02-03 1979-08-22 Andres U Electrostatic separation of particles in a fluid
WO1979000622A1 (en) * 1978-02-14 1979-09-06 R Brown Improvements in or relating to methods and apparatus for separating mixtures of particulate solids
US4239619A (en) * 1979-05-07 1980-12-16 Union Carbide Corporation Process and apparatus for separating magnetic particles within an ore
SU831189A1 (ru) * 1979-01-15 1981-05-28 Государственный Проектно-Конструкторскийинститут "Гипромашуглеобогащение" Магнитогидростатический центробежныйСЕпАРАТОР
GB2064377A (en) * 1979-10-12 1981-06-17 Imperial College Magnetic separators

Patent Citations (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US653345A (en) * 1899-12-02 1900-07-10 Theodore J Mayer Diamagnetic separation.
AT78392B (de) * 1915-04-16 1919-09-25 Gustav W Meyer Vorrichtung zur magnetischen Ausscheidung von Metallen und metallhaltigen Stoffen aus Flüssigkeiten und Gemengen oder zur Trennung von Metallgemischen durch ein magnetisches Drehfeld.
US1527069A (en) * 1923-09-06 1925-02-17 Jr Orrin B Peck Process or method of and apparatus for magnetic centrifugal separation
US2875949A (en) * 1957-11-07 1959-03-03 Tarsoly Balazs Material separator and energy apparatus
US2967618A (en) * 1960-03-28 1961-01-10 Vane Zdenek Vortical separator
US3279602A (en) * 1963-02-18 1966-10-18 Al Inc Magnetic separation process and equipment therefor
US3294237A (en) * 1963-05-31 1966-12-27 Weston David Magnetic separator
US3483968A (en) * 1967-06-12 1969-12-16 Avco Corp Method of separating materials of different density
SU385623A1 (ru) * 1968-10-04 1973-06-14 Авторы изобретени витель Магнитогидростатический центробежный сепаратор
US3608718A (en) * 1968-12-20 1971-09-28 Bethlehem Steel Corp Magnetic separator method and apparatus
GB1322229A (en) * 1970-07-09 1973-07-04 Bethlehem Steel Corp Method and apparatus for separating magnetic material
US3788465A (en) * 1972-04-28 1974-01-29 Us Interior Device and process for magneto-gravimetric particle separation using non-vertical levitation forces
US3951789A (en) * 1973-10-11 1976-04-20 Allied Chemical Corporation Novel high diffusivity membranes
GB1497769A (en) * 1975-06-20 1978-01-12 Kloeckner Humboldt Deutz Ag Method and a device for preparation of material by means of magnetic separation
SU649465A1 (ru) * 1977-02-24 1979-02-28 Центральный Научно-Исследовательский Геолого-Разведочный Институт Цветных И Благородных Металлов(Цнигри) Способ мокрого магнитного разделени минералов
GB2014061A (en) * 1978-02-03 1979-08-22 Andres U Electrostatic separation of particles in a fluid
WO1979000622A1 (en) * 1978-02-14 1979-09-06 R Brown Improvements in or relating to methods and apparatus for separating mixtures of particulate solids
SU831189A1 (ru) * 1979-01-15 1981-05-28 Государственный Проектно-Конструкторскийинститут "Гипромашуглеобогащение" Магнитогидростатический центробежныйСЕпАРАТОР
US4239619A (en) * 1979-05-07 1980-12-16 Union Carbide Corporation Process and apparatus for separating magnetic particles within an ore
GB2064377A (en) * 1979-10-12 1981-06-17 Imperial College Magnetic separators

Non-Patent Citations (13)

* Cited by examiner, † Cited by third party
Title
C. Heck: "Magnetische Werkstoffe und ihre technische Anwendung", Dr. Alfred Huthig Verlag, 1967 (Heidelberg, DE) see p. 28, table 1.3.
C. Heck: Magnetische Werkstoffe und ihre technische Anwendung , Dr. Alfred Huthig Verlag, 1967 (Heidelberg, DE) see p. 28, table 1.3. *
C. Y. Li, et al., "A Superconducting Magneto-Hydromechanical Separator"; IEEE Transactions on Magnetics, vol. Mag-17, No. 1, Jan. 1981.
C. Y. Li, et al., A Superconducting Magneto Hydromechanical Separator ; IEEE Transactions on Magnetics, vol. Mag 17, No. 1, Jan. 1981. *
Henry Cohen and Jeremy A. Good, "The Principles and Operation of a Very High Intensity Magnetic Mineral Separator", from IEEE Transactions on Magnetics, vol. Mag-12, No. 5, Sep. 1976, pp. 552-555.
Henry Cohen and Jeremy A. Good, The Principles and Operation of a Very High Intensity Magnetic Mineral Separator , from IEEE Transactions on Magnetics, vol. Mag 12, No. 5, Sep. 1976, pp. 552 555. *
Magnetohydrodynamic & Magnetohydrostatic Methods of Mined Separation, A. Andres, Keter Publ. House, Jerusalem, Israel, 1976, pp. 13, 163 164. *
Magnetohydrodynamic & Magnetohydrostatic Methods of Mined Separation, A. Andres, Keter Publ. House, Jerusalem, Israel, 1976, pp. 13, 163-164.
P. A. Reeve, "Magnetic Separation in Quadrupole Fields", Proceedings of the International Magnet Technology Conference, Bratislava, 1977.
P. A. Reeve, Magnetic Separation in Quadrupole Fields , Proceedings of the International Magnet Technology Conference, Bratislava, 1977. *
Soviet Inventions Illustrated, Section P4, Week E10, Apr. 21, 1982, (London, GB) see Abstract 19353E/10,1,99 SU,A,831189. *
Yehia M. Eyssa and Roger W. Boom, "A Feasibility Study Simulating Superconducting Magnetic Separators for Weakly-Magnetic Ores;" Journal of Mineral Processing, 2 (1975) pp. 235-248.
Yehia M. Eyssa and Roger W. Boom, A Feasibility Study Simulating Superconducting Magnetic Separators for Weakly Magnetic Ores; Journal of Mineral Processing, 2 (1975) pp. 235 248. *

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US5169517A (en) * 1989-08-02 1992-12-08 Institut Francais Du Petrole Process for the treatment of petroleum fractions containing metals, in the presence of solid particles, including a magnetohydrostatic separation stage for the said particles and the recycling of part of them
US5224604A (en) * 1990-04-11 1993-07-06 Hydro Processing & Mining Ltd. Apparatus and method for separation of wet and dry particles
AU645686B2 (en) * 1991-05-24 1994-01-20 Billiton Intellectual Property B.V. Magnetic separation process
US5356015A (en) * 1991-05-24 1994-10-18 Shell Research Limited Magnetic separation process
US5968820A (en) * 1997-02-26 1999-10-19 The Cleveland Clinic Foundation Method for magnetically separating cells into fractionated flow streams
US6355178B1 (en) 1999-04-02 2002-03-12 Theodore Couture Cyclonic separator with electrical or magnetic separation enhancement
US6467630B1 (en) 1999-09-03 2002-10-22 The Cleveland Clinic Foundation Continuous particle and molecule separation with an annular flow channel
US20050178701A1 (en) * 2004-01-26 2005-08-18 General Electric Company Method for magnetic/ferrofluid separation of particle fractions
US6994219B2 (en) 2004-01-26 2006-02-07 General Electric Company Method for magnetic/ferrofluid separation of particle fractions
US20060108271A1 (en) * 2004-11-19 2006-05-25 Solvay Chemicals Magnetic separation process for trona
US7473407B2 (en) 2004-11-19 2009-01-06 Solvay Chemicals Magnetic separation process for trona
DE102008047841B4 (de) * 2008-09-18 2015-09-17 Siemens Aktiengesellschaft Vorrichtung zum Abschneiden ferromagnetischer Partikel aus einer Suspension
RU2513936C2 (ru) * 2010-12-29 2014-04-20 Государственное образовательное учреждение высшего профессионального образования Нижегородский государственный технический университет им. Р.Е. Алексеева (НГТУ) Установка для классификации зерен абразивного материала
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ES8503528A1 (es) 1985-04-16
DE3377049D1 (en) 1988-07-21
AU573527B2 (en) 1988-06-16
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WO1983004193A1 (en) 1983-12-08
ES8500573A1 (es) 1984-11-16
MX159739A (es) 1989-08-14
AU1606483A (en) 1983-12-16
FI840239A (fi) 1984-01-20
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FI84320B (fi) 1991-08-15
CA1229070A (en) 1987-11-10

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